<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GAsyncInitable: GIO Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="index.html" title="GIO Reference Manual">
<link rel="up" href="failable_initialization.html" title="Failable Initialization">
<link rel="prev" href="GInitable.html" title="GInitable">
<link rel="next" href="subprocesses.html" title="Subprocesses">
<meta name="generator" content="GTK-Doc V1.26.1 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#GAsyncInitable.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#GAsyncInitable.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_prerequisites">  <span class="dim">|</span> 
                  <a href="#GAsyncInitable.prerequisites" class="shortcut">Prerequisites</a></span><span id="nav_implementations">  <span class="dim">|</span> 
                  <a href="#GAsyncInitable.implementations" class="shortcut">Known Implementations</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="failable_initialization.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="GInitable.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="subprocesses.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="GAsyncInitable"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GAsyncInitable.top_of_page"></a>GAsyncInitable</span></h2>
<p>GAsyncInitable — Asynchronously failable object initialization interface</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="GAsyncInitable.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GAsyncInitable.html#g-async-initable-init-async" title="g_async_initable_init_async ()">g_async_initable_init_async</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GAsyncInitable.html#g-async-initable-init-finish" title="g_async_initable_init_finish ()">g_async_initable_init_finish</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GAsyncInitable.html#g-async-initable-new-async" title="g_async_initable_new_async ()">g_async_initable_new_async</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="../gobject-The-Base-Object-Type.html#GObject-struct"><span class="returnvalue">GObject</span></a> *
</td>
<td class="function_name">
<a class="link" href="GAsyncInitable.html#g-async-initable-new-finish" title="g_async_initable_new_finish ()">g_async_initable_new_finish</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GAsyncInitable.html#g-async-initable-new-valist-async" title="g_async_initable_new_valist_async ()">g_async_initable_new_valist_async</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GAsyncInitable.html#g-async-initable-newv-async" title="g_async_initable_newv_async ()">g_async_initable_newv_async</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GAsyncInitable.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="GAsyncInitable.html#GAsyncInitable-struct" title="GAsyncInitable">GAsyncInitable</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GAsyncInitable.html#GAsyncInitableIface" title="struct GAsyncInitableIface">GAsyncInitableIface</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GAsyncInitable.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/home/mclasen/gnome/share/gtk-doc/html/gobject/GTypeModule.html">GInterface</a>
    <span class="lineart">╰──</span> GAsyncInitable
</pre>
</div>
<div class="refsect1">
<a name="GAsyncInitable.prerequisites"></a><h2>Prerequisites</h2>
<p>
GAsyncInitable requires
 <a href="../gobject-The-Base-Object-Type.html#GObject-struct">GObject</a>.</p>
</div>
<div class="refsect1">
<a name="GAsyncInitable.implementations"></a><h2>Known Implementations</h2>
<p>
GAsyncInitable is implemented by
 <a class="link" href="GDBusConnection.html" title="GDBusConnection">GDBusConnection</a>,  <a class="link" href="GDBusObjectManagerClient.html" title="GDBusObjectManagerClient">GDBusObjectManagerClient</a> and  <a class="link" href="GDBusProxy.html" title="GDBusProxy">GDBusProxy</a>.</p>
</div>
<div class="refsect1">
<a name="GAsyncInitable.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gio/gio.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="GAsyncInitable.description"></a><h2>Description</h2>
<p>This is the asynchronous version of <a class="link" href="GInitable.html" title="GInitable"><span class="type">GInitable</span></a>; it behaves the same
in all ways except that initialization is asynchronous. For more details
see the descriptions on <a class="link" href="GInitable.html" title="GInitable"><span class="type">GInitable</span></a>.</p>
<p>A class may implement both the <a class="link" href="GInitable.html" title="GInitable"><span class="type">GInitable</span></a> and <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> interfaces.</p>
<p>Users of objects implementing this are not intended to use the interface
method directly; instead it will be used automatically in various ways.
For C applications you generally just call <a class="link" href="GAsyncInitable.html#g-async-initable-new-async" title="g_async_initable_new_async ()"><code class="function">g_async_initable_new_async()</code></a>
directly, or indirectly via a <code class="function">foo_thing_new_async()</code> wrapper. This will call
<a class="link" href="GAsyncInitable.html#g-async-initable-init-async" title="g_async_initable_init_async ()"><code class="function">g_async_initable_init_async()</code></a> under the cover, calling back with <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and
a set <a href="../glib-Error-Reporting.html#GError"><code class="literal">GError</code></a> on failure.</p>
<p>A typical implementation might look something like this:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="gtkdoc kwb">enum</span> <span class="gtkdoc opt">{</span>
   NOT_INITIALIZED<span class="gtkdoc opt">,</span>
   INITIALIZING<span class="gtkdoc opt">,</span>
   INITIALIZED
<span class="gtkdoc opt">};</span>

<span class="gtkdoc kwb">static void</span>
<span class="function">_foo_ready_cb</span> <span class="gtkdoc opt">(</span>Foo <span class="gtkdoc opt">*</span>self<span class="gtkdoc opt">)</span>
<span class="gtkdoc opt">{</span>
  GList <span class="gtkdoc opt">*</span>l<span class="gtkdoc opt">;</span>

  self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>state <span class="gtkdoc opt">=</span> INITIALIZED<span class="gtkdoc opt">;</span>

  <span class="keyword">for</span> <span class="gtkdoc opt">(</span>l <span class="gtkdoc opt">=</span> self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>init_results<span class="gtkdoc opt">;</span> l <span class="gtkdoc opt">!=</span> NULL<span class="gtkdoc opt">;</span> l <span class="gtkdoc opt">=</span> l<span class="gtkdoc opt">-&gt;</span>next<span class="gtkdoc opt">)</span>
    <span class="gtkdoc opt">{</span>
      GTask <span class="gtkdoc opt">*</span>task <span class="gtkdoc opt">=</span> l<span class="gtkdoc opt">-&gt;</span>data<span class="gtkdoc opt">;</span>

      <span class="keyword">if</span> <span class="gtkdoc opt">(</span>self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>success<span class="gtkdoc opt">)</span>
        <span class="function"><a href="GTask.html#g-task-return-boolean">g_task_return_boolean</a></span> <span class="gtkdoc opt">(</span>task<span class="gtkdoc opt">,</span> TRUE<span class="gtkdoc opt">);</span>
      <span class="keyword">else</span>
        <span class="function"><a href="GTask.html#g-task-return-new-error">g_task_return_new_error</a></span> <span class="gtkdoc opt">(</span>task<span class="gtkdoc opt">, ...);</span>
      <span class="function"><a href="../gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span> <span class="gtkdoc opt">(</span>task<span class="gtkdoc opt">);</span>
    <span class="gtkdoc opt">}</span>

  <span class="function"><a href="../glib-Doubly-Linked-Lists.html#g-list-free">g_list_free</a></span> <span class="gtkdoc opt">(</span>self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>init_results<span class="gtkdoc opt">);</span>
  self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>init_results <span class="gtkdoc opt">=</span> NULL<span class="gtkdoc opt">;</span>
<span class="gtkdoc opt">}</span>

<span class="gtkdoc kwb">static void</span>
<span class="function">foo_init_async</span> <span class="gtkdoc opt">(</span>GAsyncInitable       <span class="gtkdoc opt">*</span>initable<span class="gtkdoc opt">,</span>
                <span class="gtkdoc kwb">int</span>                   io_priority<span class="gtkdoc opt">,</span>
                GCancellable         <span class="gtkdoc opt">*</span>cancellable<span class="gtkdoc opt">,</span>
                GAsyncReadyCallback   callback<span class="gtkdoc opt">,</span>
                gpointer              user_data<span class="gtkdoc opt">)</span>
<span class="gtkdoc opt">{</span>
  Foo <span class="gtkdoc opt">*</span>self <span class="gtkdoc opt">=</span> <span class="function">FOO</span> <span class="gtkdoc opt">(</span>initable<span class="gtkdoc opt">);</span>
  GTask <span class="gtkdoc opt">*</span>task<span class="gtkdoc opt">;</span>

  task <span class="gtkdoc opt">=</span> <span class="function"><a href="GTask.html#g-task-new">g_task_new</a></span> <span class="gtkdoc opt">(</span>initable<span class="gtkdoc opt">,</span> cancellable<span class="gtkdoc opt">,</span> callback<span class="gtkdoc opt">,</span> user_data<span class="gtkdoc opt">);</span>

  <span class="keyword">switch</span> <span class="gtkdoc opt">(</span>self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>state<span class="gtkdoc opt">)</span>
    <span class="gtkdoc opt">{</span>
      <span class="keyword">case</span> NOT_INITIALIZED<span class="gtkdoc opt">:</span>
        <span class="function">_foo_get_ready</span> <span class="gtkdoc opt">(</span>self<span class="gtkdoc opt">);</span>
        self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>init_results <span class="gtkdoc opt">=</span> <span class="function"><a href="../glib-Doubly-Linked-Lists.html#g-list-append">g_list_append</a></span> <span class="gtkdoc opt">(</span>self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>init_results<span class="gtkdoc opt">,</span>
                                                  task<span class="gtkdoc opt">);</span>
        self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>state <span class="gtkdoc opt">=</span> INITIALIZING<span class="gtkdoc opt">;</span>
        <span class="keyword">break</span><span class="gtkdoc opt">;</span>
      <span class="keyword">case</span> INITIALIZING<span class="gtkdoc opt">:</span>
        self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>init_results <span class="gtkdoc opt">=</span> <span class="function"><a href="../glib-Doubly-Linked-Lists.html#g-list-append">g_list_append</a></span> <span class="gtkdoc opt">(</span>self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>init_results<span class="gtkdoc opt">,</span>
                                                  task<span class="gtkdoc opt">);</span>
        <span class="keyword">break</span><span class="gtkdoc opt">;</span>
      <span class="keyword">case</span> INITIALIZED<span class="gtkdoc opt">:</span>
        <span class="keyword">if</span> <span class="gtkdoc opt">(!</span>self<span class="gtkdoc opt">-&gt;</span>priv<span class="gtkdoc opt">-&gt;</span>success<span class="gtkdoc opt">)</span>
          <span class="function"><a href="GTask.html#g-task-return-new-error">g_task_return_new_error</a></span> <span class="gtkdoc opt">(</span>task<span class="gtkdoc opt">, ...);</span>
        <span class="keyword">else</span>
          <span class="function"><a href="GTask.html#g-task-return-boolean">g_task_return_boolean</a></span> <span class="gtkdoc opt">(</span>task<span class="gtkdoc opt">,</span> TRUE<span class="gtkdoc opt">);</span>
        <span class="function"><a href="../gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span> <span class="gtkdoc opt">(</span>task<span class="gtkdoc opt">);</span>
        <span class="keyword">break</span><span class="gtkdoc opt">;</span>
    <span class="gtkdoc opt">}</span>
<span class="gtkdoc opt">}</span>

<span class="gtkdoc kwb">static</span> gboolean
<span class="function">foo_init_finish</span> <span class="gtkdoc opt">(</span>GAsyncInitable       <span class="gtkdoc opt">*</span>initable<span class="gtkdoc opt">,</span>
                 GAsyncResult         <span class="gtkdoc opt">*</span>result<span class="gtkdoc opt">,</span>
                 GError              <span class="gtkdoc opt">**</span>error<span class="gtkdoc opt">)</span>
<span class="gtkdoc opt">{</span>
  <span class="function"><a href="../glib-Warnings-and-Assertions.html#g-return-val-if-fail">g_return_val_if_fail</a></span> <span class="gtkdoc opt">(</span><span class="function"><a href="GTask.html#g-task-is-valid">g_task_is_valid</a></span> <span class="gtkdoc opt">(</span>result<span class="gtkdoc opt">,</span> initable<span class="gtkdoc opt">),</span> FALSE<span class="gtkdoc opt">);</span>

  <span class="keyword">return</span> <span class="function"><a href="GTask.html#g-task-propagate-boolean">g_task_propagate_boolean</a></span> <span class="gtkdoc opt">(</span><span class="function">G_TASK</span> <span class="gtkdoc opt">(</span>result<span class="gtkdoc opt">),</span> error<span class="gtkdoc opt">);</span>
<span class="gtkdoc opt">}</span>

<span class="gtkdoc kwb">static void</span>
<span class="function">foo_async_initable_iface_init</span> <span class="gtkdoc opt">(</span>gpointer g_iface<span class="gtkdoc opt">,</span>
                               gpointer data<span class="gtkdoc opt">)</span>
<span class="gtkdoc opt">{</span>
  GAsyncInitableIface <span class="gtkdoc opt">*</span>iface <span class="gtkdoc opt">=</span> g_iface<span class="gtkdoc opt">;</span>

  iface<span class="gtkdoc opt">-&gt;</span>init_async <span class="gtkdoc opt">=</span> foo_init_async<span class="gtkdoc opt">;</span>
  iface<span class="gtkdoc opt">-&gt;</span>init_finish <span class="gtkdoc opt">=</span> foo_init_finish<span class="gtkdoc opt">;</span>
<span class="gtkdoc opt">}</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
</div>
<div class="refsect1">
<a name="GAsyncInitable.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="g-async-initable-init-async"></a><h3>g_async_initable_init_async ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_async_initable_init_async (<em class="parameter"><code><a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> *initable</code></em>,
                             <em class="parameter"><code><span class="type">int</span> io_priority</code></em>,
                             <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                             <em class="parameter"><code><a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>,
                             <em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Starts asynchronous initialization of the object implementing the
interface. This must be done before any real use of the object after
initial construction. If the object also implements <a class="link" href="GInitable.html" title="GInitable"><span class="type">GInitable</span></a> you can
optionally call <a class="link" href="GInitable.html#g-initable-init" title="g_initable_init ()"><code class="function">g_initable_init()</code></a> instead.</p>
<p>This method is intended for language bindings. If writing in C,
<a class="link" href="GAsyncInitable.html#g-async-initable-new-async" title="g_async_initable_new_async ()"><code class="function">g_async_initable_new_async()</code></a> should typically be used instead.</p>
<p>When the initialization is finished, <em class="parameter"><code>callback</code></em>
 will be called. You can
then call <a class="link" href="GAsyncInitable.html#g-async-initable-init-finish" title="g_async_initable_init_finish ()"><code class="function">g_async_initable_init_finish()</code></a> to get the result of the
initialization.</p>
<p>Implementations may also support cancellation. If <em class="parameter"><code>cancellable</code></em>
 is not
<a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, then initialization can be cancelled by triggering the cancellable
object from another thread. If the operation was cancelled, the error
<a class="link" href="gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a> will be returned. If <em class="parameter"><code>cancellable</code></em>
 is not <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, and
the object doesn't support cancellable initialization, the error
<a class="link" href="gio-GIOError.html#G-IO-ERROR-NOT-SUPPORTED:CAPS"><code class="literal">G_IO_ERROR_NOT_SUPPORTED</code></a> will be returned.</p>
<p>As with <a class="link" href="GInitable.html" title="GInitable"><span class="type">GInitable</span></a>, if the object is not initialized, or initialization
returns with an error, then all operations on the object except
<a href="../gobject-The-Base-Object-Type.html#g-object-ref"><code class="function">g_object_ref()</code></a> and <a href="../gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a> are considered to be invalid, and
have undefined behaviour. They will often fail with <a href="../glib-Message-Logging.html#g-critical"><code class="function">g_critical()</code></a> or
<a href="../glib-Message-Logging.html#g-warning"><code class="function">g_warning()</code></a>, but this must not be relied on.</p>
<p>Callers should not assume that a class which implements <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> can
be initialized multiple times; for more information, see <a class="link" href="GInitable.html#g-initable-init" title="g_initable_init ()"><code class="function">g_initable_init()</code></a>.
If a class explicitly supports being initialized multiple times,
implementation requires yielding all subsequent calls to <code class="function">init_async()</code> on the
results of the first call.</p>
<p>For classes that also support the <a class="link" href="GInitable.html" title="GInitable"><span class="type">GInitable</span></a> interface, the default
implementation of this method will run the <a class="link" href="GInitable.html#g-initable-init" title="g_initable_init ()"><code class="function">g_initable_init()</code></a> function
in a thread, so if you want to support asynchronous initialization via
threads, just implement the <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> interface without overriding
any interface methods.</p>
<div class="refsect3">
<a name="g-async-initable-init-async.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>initable</p></td>
<td class="parameter_description"><p>a <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>io_priority</p></td>
<td class="parameter_description"><p>the <a class="link" href="GAsyncResult.html#io-priority" title="I/O Priority">I/O priority</a> of the operation</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p>optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to ignore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>a <a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> to call when the request is satisfied</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the data to pass to callback function</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-async-initable-init-finish"></a><h3>g_async_initable_init_finish ()</h3>
<pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_async_initable_init_finish (<em class="parameter"><code><a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> *initable</code></em>,
                              <em class="parameter"><code><a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a> *res</code></em>,
                              <em class="parameter"><code><a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Finishes asynchronous initialization and returns the result.
See <a class="link" href="GAsyncInitable.html#g-async-initable-init-async" title="g_async_initable_init_async ()"><code class="function">g_async_initable_init_async()</code></a>.</p>
<div class="refsect3">
<a name="g-async-initable-init-finish.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>initable</p></td>
<td class="parameter_description"><p>a <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>res</p></td>
<td class="parameter_description"><p>a <a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>a <a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> location to store the error occurring, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to
ignore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-async-initable-init-finish.returns"></a><h4>Returns</h4>
<p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if successful. If an error has occurred, this function
will return <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> and set <em class="parameter"><code>error</code></em>
appropriately if present.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-async-initable-new-async"></a><h3>g_async_initable_new_async ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_async_initable_new_async (<em class="parameter"><code><a href="../gobject-Type-Information.html#GType"><span class="type">GType</span></a> object_type</code></em>,
                            <em class="parameter"><code><span class="type">int</span> io_priority</code></em>,
                            <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                            <em class="parameter"><code><a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>,
                            <em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                            <em class="parameter"><code>const <a href="../glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
                            <em class="parameter"><code>...</code></em>);</pre>
<p>Helper function for constructing <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> object. This is
similar to <a href="../gobject-The-Base-Object-Type.html#g-object-new"><code class="function">g_object_new()</code></a> but also initializes the object asynchronously.</p>
<p>When the initialization is finished, <em class="parameter"><code>callback</code></em>
 will be called. You can
then call <a class="link" href="GAsyncInitable.html#g-async-initable-new-finish" title="g_async_initable_new_finish ()"><code class="function">g_async_initable_new_finish()</code></a> to get the new object and check
for any errors.</p>
<div class="refsect3">
<a name="g-async-initable-new-async.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>object_type</p></td>
<td class="parameter_description"><p>a <a href="../gobject-Type-Information.html#GType"><span class="type">GType</span></a> supporting <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>io_priority</p></td>
<td class="parameter_description"><p>the <a class="link" href="GAsyncResult.html#io-priority" title="I/O Priority">I/O priority</a> of the operation</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p>optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to ignore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>a <a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> to call when the initialization is
finished</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the data to pass to callback function</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>first_property_name</p></td>
<td class="parameter_description"><p>the name of the first property, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if no
properties. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>the value of the first property, followed by other property
value pairs, and ended by <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-async-initable-new-finish"></a><h3>g_async_initable_new_finish ()</h3>
<pre class="programlisting"><a href="../gobject-The-Base-Object-Type.html#GObject-struct"><span class="returnvalue">GObject</span></a> *
g_async_initable_new_finish (<em class="parameter"><code><a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> *initable</code></em>,
                             <em class="parameter"><code><a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a> *res</code></em>,
                             <em class="parameter"><code><a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Finishes the async construction for the various g_async_initable_new
calls, returning the created object or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> on error.</p>
<div class="refsect3">
<a name="g-async-initable-new-finish.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>initable</p></td>
<td class="parameter_description"><p>the <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> from the callback</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>res</p></td>
<td class="parameter_description"><p>the <a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a> from the callback</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>return location for errors, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to ignore</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-async-initable-new-finish.returns"></a><h4>Returns</h4>
<p>a newly created <a href="../gobject-The-Base-Object-Type.html#GObject-struct"><span class="type">GObject</span></a>,
or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> on error. Free with <a href="../gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a>. </p>
<p><span class="annotation">[<acronym title="Override the parsed C type with given type."><span class="acronym">type</span></acronym> GObject.Object][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-async-initable-new-valist-async"></a><h3>g_async_initable_new_valist_async ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_async_initable_new_valist_async (<em class="parameter"><code><a href="../gobject-Type-Information.html#GType"><span class="type">GType</span></a> object_type</code></em>,
                                   <em class="parameter"><code>const <a href="../glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
                                   <em class="parameter"><code><span class="type">va_list</span> var_args</code></em>,
                                   <em class="parameter"><code><span class="type">int</span> io_priority</code></em>,
                                   <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                                   <em class="parameter"><code><a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>,
                                   <em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Helper function for constructing <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> object. This is
similar to <a href="../gobject-The-Base-Object-Type.html#g-object-new-valist"><code class="function">g_object_new_valist()</code></a> but also initializes the object
asynchronously.</p>
<p>When the initialization is finished, <em class="parameter"><code>callback</code></em>
 will be called. You can
then call <a class="link" href="GAsyncInitable.html#g-async-initable-new-finish" title="g_async_initable_new_finish ()"><code class="function">g_async_initable_new_finish()</code></a> to get the new object and check
for any errors.</p>
<div class="refsect3">
<a name="g-async-initable-new-valist-async.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>object_type</p></td>
<td class="parameter_description"><p>a <a href="../gobject-Type-Information.html#GType"><span class="type">GType</span></a> supporting <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>first_property_name</p></td>
<td class="parameter_description"><p>the name of the first property, followed by
the value, and other property value pairs, and ended by <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>var_args</p></td>
<td class="parameter_description"><p>The var args list generated from <em class="parameter"><code>first_property_name</code></em>
.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>io_priority</p></td>
<td class="parameter_description"><p>the <a class="link" href="GAsyncResult.html#io-priority" title="I/O Priority">I/O priority</a> of the operation</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p>optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to ignore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>a <a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> to call when the initialization is
finished</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the data to pass to callback function</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-async-initable-newv-async"></a><h3>g_async_initable_newv_async ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_async_initable_newv_async (<em class="parameter"><code><a href="../gobject-Type-Information.html#GType"><span class="type">GType</span></a> object_type</code></em>,
                             <em class="parameter"><code><a href="../glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_parameters</code></em>,
                             <em class="parameter"><code><a href="../gobject-The-Base-Object-Type.html#GParameter"><span class="type">GParameter</span></a> *parameters</code></em>,
                             <em class="parameter"><code><span class="type">int</span> io_priority</code></em>,
                             <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                             <em class="parameter"><code><a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>,
                             <em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<div class="warning">
<p><code class="literal">g_async_initable_newv_async</code> has been deprecated since version 2.54 and should not be used in newly-written code.</p>
<p>Use <a href="../gobject-The-Base-Object-Type.html#g-object-new-with-properties"><code class="function">g_object_new_with_properties()</code></a> and
<a class="link" href="GAsyncInitable.html#g-async-initable-init-async" title="g_async_initable_init_async ()"><code class="function">g_async_initable_init_async()</code></a> instead. See <a href="../gobject-The-Base-Object-Type.html#GParameter"><span class="type">GParameter</span></a> for more information.</p>
</div>
<p>Helper function for constructing <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a> object. This is
similar to <a href="../gobject-The-Base-Object-Type.html#g-object-newv"><code class="function">g_object_newv()</code></a> but also initializes the object asynchronously.</p>
<p>When the initialization is finished, <em class="parameter"><code>callback</code></em>
 will be called. You can
then call <a class="link" href="GAsyncInitable.html#g-async-initable-new-finish" title="g_async_initable_new_finish ()"><code class="function">g_async_initable_new_finish()</code></a> to get the new object and check
for any errors.</p>
<div class="refsect3">
<a name="g-async-initable-newv-async.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>object_type</p></td>
<td class="parameter_description"><p>a <a href="../gobject-Type-Information.html#GType"><span class="type">GType</span></a> supporting <a class="link" href="GAsyncInitable.html" title="GAsyncInitable"><span class="type">GAsyncInitable</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n_parameters</p></td>
<td class="parameter_description"><p>the number of parameters in <em class="parameter"><code>parameters</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parameters</p></td>
<td class="parameter_description"><p>the parameters to use to construct the object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>io_priority</p></td>
<td class="parameter_description"><p>the <a class="link" href="GAsyncResult.html#io-priority" title="I/O Priority">I/O priority</a> of the operation</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p>optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to ignore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>a <a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> to call when the initialization is
finished</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the data to pass to callback function</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
</div>
<div class="refsect1">
<a name="GAsyncInitable.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GAsyncInitable-struct"></a><h3>GAsyncInitable</h3>
<pre class="programlisting">typedef struct _GAsyncInitable GAsyncInitable;</pre>
<p>Interface for asynchronously initializable objects.</p>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GAsyncInitableIface"></a><h3>struct GAsyncInitableIface</h3>
<pre class="programlisting">struct GAsyncInitableIface {
  GTypeInterface g_iface;

  /* Virtual Table */

  void     (* init_async)  (GAsyncInitable      *initable,
			    int                  io_priority,
			    GCancellable        *cancellable,
			    GAsyncReadyCallback  callback,
			    gpointer             user_data);
  gboolean (* init_finish) (GAsyncInitable      *initable,
			    GAsyncResult        *res,
			    GError             **error);
};
</pre>
<p>Provides an interface for asynchronous initializing object such that
initialization may fail.</p>
<div class="refsect3">
<a name="GAsyncInitableIface.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GAsyncInitableIface.init-async"></a>init_async</code></em> ()</p></td>
<td class="struct_member_description"><p>Starts initialization of the object.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GAsyncInitableIface.init-finish"></a>init_finish</code></em> ()</p></td>
<td class="struct_member_description"><p>Finishes initialization of the object.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
</div>
<div class="refsect1">
<a name="GAsyncInitable.see-also"></a><h2>See Also</h2>
<p><a class="link" href="GInitable.html" title="GInitable"><span class="type">GInitable</span></a></p>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.26.1</div>
</body>
</html>